Add a unified audio I/O backend for ChromeOS.

media/media.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the PulseAudio library.
     'use_pulseaudio%': 0,
     # Override to dynamically link the cras (ChromeOS audio) library.
@@ skipping 94 matching lines @@
         'audio/linux/alsa_util.cc',
         'audio/linux/alsa_util.h',
         'audio/linux/alsa_wrapper.cc',
         'audio/linux/alsa_wrapper.h',
         'audio/linux/audio_manager_linux.cc',
         'audio/linux/audio_manager_linux.h',
         'audio/linux/cras_input.cc',
         'audio/linux/cras_input.h',
         'audio/linux/cras_output.cc',
         'audio/linux/cras_output.h',
+        'audio/linux/cras_unified.cc',
+        'audio/linux/cras_unified.h',
         'audio/mac/audio_device_listener_mac.cc',
         'audio/mac/audio_device_listener_mac.h',
         'audio/mac/audio_input_mac.cc',
         'audio/mac/audio_input_mac.h',
         'audio/mac/audio_low_latency_input_mac.cc',
         'audio/mac/audio_low_latency_input_mac.h',
         'audio/mac/audio_low_latency_output_mac.cc',
         'audio/mac/audio_low_latency_output_mac.h',
         'audio/mac/audio_manager_mac.cc',
         'audio/mac/audio_manager_mac.h',
@@ skipping 392 matching lines @@
               },
               'defines': [
                 'USE_CRAS',
               ],
             }, {  # else: use_cras == 0
               'sources!': [
                 'audio/linux/cras_input.cc',
                 'audio/linux/cras_input.h',
                 'audio/linux/cras_output.cc',
                 'audio/linux/cras_output.h',
+                'audio/linux/cras_unified.cc',
+                'audio/linux/cras_unified.h',
               ],
             }],
           ],
         }],
         ['os_posix == 1', {
           'conditions': [
             ['use_pulseaudio == 1', {
               'cflags': [
                 '<!@(pkg-config --cflags libpulse)',
               ],
@@ skipping 269 matching lines @@
               ],
             }],
           ],
         }],
         ['OS == "linux"', {
           'conditions': [
             ['use_cras == 1', {
               'sources': [
                 'audio/linux/cras_input_unittest.cc',
                 'audio/linux/cras_output_unittest.cc',
+                'audio/linux/cras_unified_unittest.cc',
               ],
               'defines': [
                 'USE_CRAS',
               ],
             }],
           ],
         }],
         [ 'target_arch=="ia32" or target_arch=="x64"', {
           'sources': [
             'base/simd/convert_rgb_to_yuv_unittest.cc',
@@ skipping 540 matching lines @@
             'media',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }